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Avalanche Forecast

Archived

Mar 21st, 2023–Mar 22nd, 2023

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Chic-Choc Mountains, Littoral, Murdochville.

Remember that even with a low avalanche danger rating, it is possible to have size 2 avalanches in isolated areas or in extreme terrain.

Take some time to get familiar with the changes of the past few days and to build your confidence in the snowpack before committing to high consequence terrain.

If you go out in the mountains, please share your observations of the conditions with other users on the Mountain Information Network

Confidence

High

Avalanche Summary

No new avalanches were observed or reported.

Thanks for contributing to the collection of this valuable data by sharing with other users on the Mountain Information Network or by writing to us directly at [email protected].

Snowpack Summary

In the alpine and on open features, the snow from the weekend has been transported, leaving various wind affected surfaces (soft and hard slabs, sastrugi, ice, pressed snow). In sheltered areas, 10 to 25 cm of low density snow cover the March 18 melt freeze crust, observed at all altitudes. Below 500m, a thin melt freeze crust is perceptible on the surface, due to the mild temperatures of Monday and Tuesday.

Even at high altitude, the radiation had a limited effect, Tuesday. Meaning that on solar slopes, a thin crust is perceptible on the surface.

The mid-snowpack is well consolidated and right side up. The base of the snow pack is composed of laminated crusts. In general, the height of the snowpack varies from 90 to 110 cm in the valley to 130 to 180 cm at treeline.

Weather Summary

Forecast for the Chic-Chocs ridges and summits.

Synopsis: Squalls and a weak low pressure system will bring negligible amounts of snow overnight and Wednesday.

Tuesday night and overnight: Mostly cloudy. 1 to 2 cm of snow. Winds from 35 to 45 km/h from the northwest. Min. -18C.

Wednesday: Alternating sun and clouds. 1 to 2 cm of snow. Winds from 40 to 50 km/h from the northwest. Max. -16C.

Thursday: Cloudy. 2 to 3 cm of snow. Winds from 30 to 40 km/h from the south. Max. -7C.

Friday: Cloudy. 8 to 12 cm of snow. Winds from 60 to 70 km/h from the southeast. Max. -10C.

For more details, see the Chic-Chocs alpine forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Approach lee and cross-loaded slopes with caution.
  • Expect slab conditions to change drastically as you move into wind exposed terrain.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.